200121122001 has 8 divisors (see below), whose sum is σ = 274039734784. Its totient is φ = 129808295280.

The previous prime is 200121121997. The next prime is 200121122041. The reversal of 200121122001 is 100221121002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 200121122001 - 2² = 200121121997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200121122041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901446385 + ... + 901446606.

It is an arithmetic number, because the mean of its divisors is an integer number (34254966848).

Almost surely, 2^200121122001 is an apocalyptic number.

It is an amenable number.

200121122001 is a deficient number, since it is larger than the sum of its proper divisors (73918612783).

200121122001 is a wasteful number, since it uses less digits than its factorization.

200121122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802893031.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 200121122001 its reverse (100221121002), we get a palindrome (300342243003).

Subtracting from 200121122001 its reverse (100221121002), we obtain a palindrome (99900000999).

The spelling of 200121122001 in words is "two hundred billion, one hundred twenty-one million, one hundred twenty-two thousand, one".